mirror of
https://github.com/golang/go
synced 2024-11-19 22:04:44 -07:00
58e3ae2fae
Reduces the size of m by ~8% on linux/amd64 (1040 bytes -> 960 bytes). There are also windows-specific fields, but they're currently referenced in OS-independent source files (but only when GOOS=="windows"). Change-Id: I13e1471ff585ccced1271f74209f8ed6df14c202 Reviewed-on: https://go-review.googlesource.com/16173 Run-TryBot: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org>
251 lines
4.4 KiB
ArmAsm
251 lines
4.4 KiB
ArmAsm
// Copyright 2010 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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#include "go_asm.h"
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#include "go_tls.h"
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#include "textflag.h"
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// setldt(int entry, int address, int limit)
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TEXT runtime·setldt(SB),NOSPLIT,$0
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RET
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TEXT runtime·open(SB),NOSPLIT,$0
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MOVL $14, AX
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INT $64
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MOVL AX, ret+12(FP)
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RET
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TEXT runtime·pread(SB),NOSPLIT,$0
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MOVL $50, AX
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INT $64
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MOVL AX, ret+20(FP)
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RET
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TEXT runtime·pwrite(SB),NOSPLIT,$0
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MOVL $51, AX
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INT $64
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MOVL AX, ret+20(FP)
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RET
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// int32 _seek(int64*, int32, int64, int32)
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TEXT _seek<>(SB),NOSPLIT,$0
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MOVL $39, AX
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INT $64
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RET
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TEXT runtime·seek(SB),NOSPLIT,$24
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LEAL ret+16(FP), AX
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MOVL fd+0(FP), BX
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MOVL offset_lo+4(FP), CX
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MOVL offset_hi+8(FP), DX
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MOVL whence+12(FP), SI
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MOVL AX, 0(SP)
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MOVL BX, 4(SP)
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MOVL CX, 8(SP)
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MOVL DX, 12(SP)
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MOVL SI, 16(SP)
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CALL _seek<>(SB)
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CMPL AX, $0
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JGE 3(PC)
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MOVL $-1, ret_lo+16(FP)
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MOVL $-1, ret_hi+20(FP)
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RET
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TEXT runtime·closefd(SB),NOSPLIT,$0
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MOVL $4, AX
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INT $64
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MOVL AX, ret+4(FP)
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RET
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TEXT runtime·exits(SB),NOSPLIT,$0
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MOVL $8, AX
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INT $64
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RET
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TEXT runtime·brk_(SB),NOSPLIT,$0
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MOVL $24, AX
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INT $64
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MOVL AX, ret+4(FP)
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RET
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TEXT runtime·sleep(SB),NOSPLIT,$0
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MOVL $17, AX
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INT $64
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MOVL AX, ret+4(FP)
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RET
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TEXT runtime·plan9_semacquire(SB),NOSPLIT,$0
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MOVL $37, AX
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INT $64
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MOVL AX, ret+8(FP)
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RET
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TEXT runtime·plan9_tsemacquire(SB),NOSPLIT,$0
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MOVL $52, AX
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INT $64
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MOVL AX, ret+8(FP)
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RET
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TEXT nsec<>(SB),NOSPLIT,$0
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MOVL $53, AX
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INT $64
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RET
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TEXT runtime·nsec(SB),NOSPLIT,$8
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LEAL ret+4(FP), AX
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MOVL AX, 0(SP)
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CALL nsec<>(SB)
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CMPL AX, $0
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JGE 3(PC)
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MOVL $-1, ret_lo+4(FP)
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MOVL $-1, ret_hi+8(FP)
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RET
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// func now() (sec int64, nsec int32)
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TEXT time·now(SB),NOSPLIT,$8-12
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CALL runtime·nanotime(SB)
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MOVL 0(SP), AX
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MOVL 4(SP), DX
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MOVL $1000000000, CX
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DIVL CX
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MOVL AX, sec+0(FP)
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MOVL $0, sec+4(FP)
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MOVL DX, nsec+8(FP)
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RET
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TEXT runtime·notify(SB),NOSPLIT,$0
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MOVL $28, AX
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INT $64
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MOVL AX, ret+4(FP)
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RET
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TEXT runtime·noted(SB),NOSPLIT,$0
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MOVL $29, AX
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INT $64
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MOVL AX, ret+4(FP)
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RET
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TEXT runtime·plan9_semrelease(SB),NOSPLIT,$0
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MOVL $38, AX
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INT $64
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MOVL AX, ret+8(FP)
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RET
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TEXT runtime·rfork(SB),NOSPLIT,$0
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MOVL $19, AX
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INT $64
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MOVL AX, ret+4(FP)
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RET
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TEXT runtime·tstart_plan9(SB),NOSPLIT,$0
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MOVL newm+0(FP), CX
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MOVL m_g0(CX), DX
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// Layout new m scheduler stack on os stack.
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MOVL SP, AX
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MOVL AX, (g_stack+stack_hi)(DX)
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SUBL $(64*1024), AX // stack size
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MOVL AX, (g_stack+stack_lo)(DX)
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MOVL AX, g_stackguard0(DX)
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MOVL AX, g_stackguard1(DX)
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// Initialize procid from TOS struct.
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MOVL _tos(SB), AX
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MOVL 48(AX), AX
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MOVL AX, m_procid(CX) // save pid as m->procid
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// Finally, initialize g.
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get_tls(BX)
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MOVL DX, g(BX)
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CALL runtime·stackcheck(SB) // smashes AX, CX
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CALL runtime·mstart(SB)
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MOVL $0x1234, 0x1234 // not reached
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RET
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// void sigtramp(void *ureg, int8 *note)
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TEXT runtime·sigtramp(SB),NOSPLIT,$0
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get_tls(AX)
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// check that g exists
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MOVL g(AX), BX
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CMPL BX, $0
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JNE 3(PC)
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CALL runtime·badsignal2(SB) // will exit
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RET
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// save args
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MOVL ureg+4(SP), CX
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MOVL note+8(SP), DX
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// change stack
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MOVL g_m(BX), BX
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MOVL m_gsignal(BX), BP
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MOVL (g_stack+stack_hi)(BP), BP
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MOVL BP, SP
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// make room for args and g
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SUBL $24, SP
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// save g
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MOVL g(AX), BP
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MOVL BP, 20(SP)
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// g = m->gsignal
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MOVL m_gsignal(BX), DI
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MOVL DI, g(AX)
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// load args and call sighandler
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MOVL CX, 0(SP)
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MOVL DX, 4(SP)
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MOVL BP, 8(SP)
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CALL runtime·sighandler(SB)
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MOVL 12(SP), AX
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// restore g
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get_tls(BX)
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MOVL 20(SP), BP
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MOVL BP, g(BX)
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// call noted(AX)
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MOVL AX, 0(SP)
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CALL runtime·noted(SB)
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RET
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// Only used by the 64-bit runtime.
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TEXT runtime·setfpmasks(SB),NOSPLIT,$0
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RET
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#define ERRMAX 128 /* from os_plan9.h */
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// void errstr(int8 *buf, int32 len)
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TEXT errstr<>(SB),NOSPLIT,$0
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MOVL $41, AX
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INT $64
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RET
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// func errstr() string
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// Only used by package syscall.
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// Grab error string due to a syscall made
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// in entersyscall mode, without going
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// through the allocator (issue 4994).
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// See ../syscall/asm_plan9_386.s:/·Syscall/
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TEXT runtime·errstr(SB),NOSPLIT,$8-8
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get_tls(AX)
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MOVL g(AX), BX
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MOVL g_m(BX), BX
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MOVL (m_mOS+mOS_errstr)(BX), CX
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MOVL CX, 0(SP)
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MOVL $ERRMAX, 4(SP)
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CALL errstr<>(SB)
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CALL runtime·findnull(SB)
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MOVL 4(SP), AX
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MOVL AX, ret_len+4(FP)
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MOVL 0(SP), AX
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MOVL AX, ret_base+0(FP)
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RET
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